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Multilink - Reliability & Frame Errors

We have a customer in the USA who has two 1.5Mbps connections bonded into a Multilink connection.

On our monitoring we are seeing hundreds of thousands if not millions of receive errors per day (currently our monitoring - Solarwinds Orion - is reporting 215,000 receive errors just for today). This site is a DR site for the customer and they have advised they are not uploading / downloading any traffic to this site (our monitoring confirms this).

The two serial interfaces are error free, however the multilink interface is racking up input frame errors. We have had Verizon check both the lines and they came back clear.

Attachment with all the output.

Router is an 1841 with 12.4-16 IOS.

Edit: I found a similar thread here but no resolution:^1%40%40.2cd31c59

Many thanks,

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Re: Multilink - Reliability & Frame Errors

MLPPP can give serial trouble at times. Begin disabling it while investigating.

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Re: Multilink - Reliability & Frame Errors

We raised a Cisco TAC case as we were still having issues.

Turns out this is actually a bug in the IOS.

IOS was upgraded last night after customer agreed maintenance window and so far we have not seen any errors on the Multilink interface.


Re: Multilink - Reliability & Frame Errors

Hello Oreilly,

I think I'm having the same problem as what you have experienced in 2009. Could you share what version of IOS that having the problem? I cannot open the link that you provide above as I do not have previllage to access it.

My thread about this problem:

Thank you!



Re: Multilink - Reliability & Frame Errors

What version are you running and I can tell you if it's on the list....

HTH, John *** Please rate all useful posts ***

Re: Multilink - Reliability & Frame Errors

Hi J.Blakley,

Thanks again for replying my post. Appreciate it

Please see below:

#sh version

Cisco IOS Software, 1841 Software (C1841-IPBASE-M), Version 15.0(1)M4, RELEASE SOFTWARE (fc1)

Thank you very much

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